FreeBSD Manual Pages
VARNISH-COUNTERS(7) VARNISH-COUNTERS(7) NAME varnish-counters - Varnish counter field definitions LCK LOCK COUNTERS Counters which track the activity in the different classes of mu- tex-locks. The counts may be slightly wrong if there are more than one lock in- stantiated in each class (ie: .creat > 1) creat counter - debug Created locks destroy counter - debug Destroyed locks locks counter - debug Lock Operations dbg_busy counter - debug Contended lock operations If the lck debug bit is set: Lock operations which returned EBUSY on the first locking attempt. If the lck debug bit is unset, this counter will never be incre- mented even if lock operations are contended. dbg_try_fail counter - debug Contended trylock operations If the lck debug bit is set: Trylock operations which returned EBUSY. If the lck debug bit is unset, this counter will never be incre- mented even if lock operations are contended. MAIN MAIN COUNTERS summs counter - debug stat summ operations Number of times per-thread statistics were summed into the global counters. uptime counter - info Child process uptime How long the child process has been running. sess_conn counter - info Sessions accepted Count of sessions successfully accepted sess_fail counter - info Session accept failures Count of failures to accept TCP connection. This counter is the sum of the sess_fail_* counters, which give more detailed information. sess_fail_econnaborted counter - info Session accept failures: connection aborted Detailed reason for sess_fail: Connection aborted by the client, usually harmless. sess_fail_eintr counter - info Session accept failures: interrupted system call Detailed reason for sess_fail: The accept() call was interrupted, usually harmless sess_fail_emfile counter - info Session accept failures: too many open files Detailed reason for sess_fail: No file descriptor was available. Consider raising RLIMIT_NOFILE (see ulimit -n). sess_fail_ebadf counter - info Session accept failures: bad file descriptor Detailed reason for sess_fail: The listen socket file descriptor was invalid. Should never happen. sess_fail_enomem counter - info Session accept failures: not enough memory Detailed reason for sess_fail: Most likely insufficient socket buffer memory. Should never happen sess_fail_other counter - info Session accept failures: other Detailed reason for sess_fail: neither of the above, see SessError log (varnishlog -g raw -i SessError). client_req_400 counter - info Client requests received, subject to 400 errors 400 means we couldn't make sense of the request, it was malformed in some drastic way. client_req_417 counter - info Client requests received, subject to 417 errors 417 means that something went wrong with an Expect: header. client_req counter - info Good client requests received The count of parseable client requests seen. esi_req counter - info ESI subrequests Number of ESI subrequests made. cache_hit counter - info Cache hits Count of cache hits. A cache hit indicates that an object has been delivered to a client without fetching it from a backend server. cache_hit_grace counter - info Cache grace hits Count of cache hits with grace. A cache hit with grace is a cache hit where the object is expired. Note that such hits are also in- cluded in the cache_hit counter. cache_hitpass counter - info Cache hits for pass. Count of hits for pass. A cache hit for pass indicates that Varnish is going to pass the request to the backend and this decision has been cached in it self. This counts how many times the cached deci- sion is being used. cache_hitmiss counter - info Cache hits for miss. Count of hits for miss. A cache hit for miss indicates that Varnish is going to proceed as for a cache miss without request coalescing, and this decision has been cached. This counts how many times the cached decision is being used. cache_miss counter - info Cache misses Count of misses. A cache miss indicates the object was fetched from the backend before delivering it to the client. beresp_uncacheable counter - info Uncacheable backend responses Count of backend responses considered uncacheable. beresp_shortlived counter - info Shortlived objects Count of objects created with ttl+grace+keep shorter than the 'shortlived' runtime parameter. backend_conn counter - info Backend conn. success How many backend connections have successfully been established. backend_unhealthy counter - info Backend conn. not attempted backend_busy counter - info Backend conn. too many backend_fail counter - info Backend conn. failures backend_reuse counter - info Backend conn. reuses Count of backend connection reuses. This counter is increased when- ever we reuse a recycled connection. backend_recycle counter - info Backend conn. recycles Count of backend connection recycles. This counter is increased whenever we have a keep-alive connection that is put back into the pool of connections. It has not yet been used, but it might be, un- less the backend closes it. backend_retry counter - info Backend conn. retry backend_wait counter - info Backend conn. waited in queue for a connection Count of backend requests that waited in a backend_wait queue for a connection to become available. The size of a backend wait queue is defined by the backend wait_limit property. The wait queue is only used when max_connections to the backend are in use. backend_wait_fail counter - info Backend conn. waited in queue and did not get a connection Count of backend requests that waited in a backend_wait queue for a connection to become available and did not get one (timed out). The maximum time to wait in the queue is defined by the backend wait_timeout property. fetch_head counter - info Fetch no body (HEAD) beresp with no body because the request is HEAD. fetch_length counter - info Fetch with Length beresp.body with Content-Length. fetch_chunked counter - info Fetch chunked beresp.body with Chunked. fetch_eof counter - info Fetch EOF beresp.body with EOF. fetch_bad counter - info Fetch bad T-E beresp.body length/fetch could not be determined. fetch_none counter - info Fetch no body beresp.body empty fetch_1xx counter - info Fetch no body (1xx) beresp with no body because of 1XX response. fetch_204 counter - info Fetch no body (204) beresp with no body because of 204 response. fetch_304 counter - info Fetch no body (304) beresp with no body because of 304 response. fetch_failed counter - info Fetch failed (all causes) beresp fetch failed. bgfetch_no_thread counter - info Background fetch failed (no thread) A bgfetch triggered by a grace hit failed, no thread available. pools gauge - info Number of thread pools Number of thread pools. See also parameter thread_pools. NB: Presently pools cannot be removed once created. threads gauge - info Total number of threads Number of threads in all pools. See also parameters thread_pools, thread_pool_min and thread_pool_max. threads_limited counter - info Threads hit max Number of times more threads were needed, but limit was reached in a thread pool. See also parameter thread_pool_max. threads_created counter - info Threads created Total number of threads created in all pools. threads_destroyed counter - info Threads destroyed Total number of threads destroyed in all pools. threads_failed counter - info Thread creation failed Number of times creating a thread failed. See VSL::Debug for diag- nostics. See also parameter thread_fail_delay. thread_queue_len gauge - info Length of session queue Length of session queue waiting for threads. NB: Only updates once per second. See also parameter thread_queue_limit. busy_sleep counter - info Number of requests sent to sleep on busy objhdr Number of requests sent to sleep without a worker thread because they found a busy object. busy_wakeup counter - info Number of requests woken after sleep on busy objhdr Number of requests taken off the busy object sleep list and resched- uled. busy_killed counter - info Number of requests killed after sleep on busy objhdr Number of requests killed from the busy object sleep list due to lack of resources. sess_queued counter - info Sessions queued for thread Number of times session was queued waiting for a thread. See also parameter thread_queue_limit. sess_dropped counter - info Sessions dropped for thread Number of times an HTTP/1 session was dropped because the queue was too long already. See also parameter thread_queue_limit. req_dropped counter - info Requests dropped Number of times an HTTP/2 stream was refused because the queue was too long already. See also parameter thread_queue_limit. req_reset counter - info Requests reset Number of times a client left before the VCL processing of its re- quests completed. For HTTP/2 sessions, either the stream was reset by an RST_STREAM frame from the client, or a stream or connection error occurred. n_object gauge - info object structs made Approximate number of HTTP objects (headers + body, if present) in the cache. n_vampireobject gauge - diag unresurrected objects Number of unresurrected objects n_objectcore gauge - info objectcore structs made Approximate number of object metadata elements in the cache. Each object needs an objectcore, extra objectcores are for hit-for-miss, hit-for-pass and busy objects. n_objecthead gauge - info objecthead structs made Approximate number of different hash entries in the cache. n_backend gauge - info Number of backends Number of backends known to us. n_expired counter - info Number of expired objects Number of objects that expired from cache because of old age. n_superseded counter - diag Number of superseded objects Number of times an object was superseded by a new one. n_lru_nuked counter - info Number of LRU nuked objects How many objects have been forcefully evicted from storage to make room for a new object. n_lru_moved counter - diag Number of LRU moved objects Number of move operations done on the LRU list. n_lru_limited counter - info Reached nuke_limit Number of times more storage space were needed, but limit was reached in a nuke_limit. See also parameter nuke_limit. losthdr counter - info HTTP header overflows s_sess counter - info Total sessions seen n_pipe gauge - info Number of ongoing pipe sessions pipe_limited counter - info Pipes hit pipe_sess_max Number of times more pipes were needed, but the limit was reached. See also parameter pipe_sess_max. s_pipe counter - info Total pipe sessions seen s_pass counter - info Total pass-ed requests seen s_fetch counter - info Total backend fetches initiated Total backend fetches initiated, including background fetches. s_bgfetch counter - info Total backend background fetches initiated s_synth counter - info Total synthetic responses made s_req_hdrbytes counter - info Request header bytes Total request header bytes received s_req_bodybytes counter - info Request body bytes Total request body bytes received s_resp_hdrbytes counter - info Response header bytes Total response header bytes transmitted s_resp_bodybytes counter - info Response body bytes Total response body bytes transmitted s_pipe_hdrbytes counter - info Pipe request header bytes Total request bytes received for piped sessions s_pipe_in counter - info Piped bytes from client Total number of bytes forwarded from clients in pipe sessions s_pipe_out counter - info Piped bytes to client Total number of bytes forwarded to clients in pipe sessions sess_closed counter - info Session Closed sess_closed_err counter - info Session Closed with error Total number of sessions closed with errors. See sc_* diag counters for detailed breakdown sess_readahead counter - info Session Read Ahead sess_herd counter - diag Session herd Number of times the timeout_linger triggered sc_rem_close counter - diag Session OK REM_CLOSE Number of session closes with REM_CLOSE (Client Closed) sc_req_close counter - diag Session OK REQ_CLOSE Number of session closes with REQ_CLOSE (Client requested close) sc_req_http10 counter - diag Session Err REQ_HTTP10 Number of session closes with Error REQ_HTTP10 (Proto < HTTP/1.1) sc_rx_bad counter - diag Session Err RX_BAD Number of session closes with Error RX_BAD (Received bad req/resp) sc_rx_body counter - diag Session Err RX_BODY Number of session closes with Error RX_BODY (Failure receiving req.body) sc_rx_junk counter - diag Session Err RX_JUNK Number of session closes with Error RX_JUNK (Received junk data) sc_rx_overflow counter - diag Session Err RX_OVERFLOW Number of session closes with Error RX_OVERFLOW (Received buffer overflow) sc_rx_timeout counter - diag Session Err RX_TIMEOUT Number of session closes with Error RX_TIMEOUT (Receive timeout) sc_rx_close_idle counter - diag Session Err RX_CLOSE_IDLE Number of session closes with Error RX_CLOSE_IDLE: timeout_idle has been exceeded while waiting for a client request. sc_tx_pipe counter - diag Session OK TX_PIPE Number of session closes with TX_PIPE (Piped transaction) sc_tx_error counter - diag Session Err TX_ERROR Number of session closes with Error TX_ERROR (Error transaction) sc_tx_eof counter - diag Session OK TX_EOF Number of session closes with TX_EOF (EOF transmission) sc_resp_close counter - diag Session OK RESP_CLOSE Number of session closes with RESP_CLOSE (Backend/VCL requested close) sc_overload counter - diag Session Err OVERLOAD Number of session closes with Error OVERLOAD (Out of some resource) sc_pipe_overflow counter - diag Session Err PIPE_OVERFLOW Number of session closes with Error PIPE_OVERFLOW (Session pipe overflow) sc_range_short counter - diag Session Err RANGE_SHORT Number of session closes with Error RANGE_SHORT (Insufficient data for range) sc_req_http20 counter - diag Session Err REQ_HTTP20 Number of session closes with Error REQ_HTTP20 (HTTP2 not accepted) sc_vcl_failure counter - diag Session Err VCL_FAILURE Number of session closes with Error VCL_FAILURE (VCL failure) sc_rapid_reset counter - diag Session Err RAPID_RESET Number of times we failed an http/2 session because it hit its con- figured limits for the number of permitted rapid stream resets. sc_bankrupt counter - diag Session Err BANKRUPT Number of times we failed an http/2 session because all the streams were waiting for their windows to be credited when h2_window_timeout triggered. client_resp_500 counter - diag Delivery failed due to insufficient workspace. Number of times we failed a response due to running out of workspace memory during delivery. ws_backend_overflow counter - diag workspace_backend overflows Number of times we ran out of space in workspace_backend. ws_client_overflow counter - diag workspace_client overflows Number of times we ran out of space in workspace_client. ws_thread_overflow counter - diag workspace_thread overflows Number of times we ran out of space in workspace_thread. ws_session_overflow counter - diag workspace_session overflows Number of times we ran out of space in workspace_session. shm_records counter - diag SHM records Number of log records written to the shared memory log. shm_writes counter - diag SHM writes Number of individual writes to the shared memory log. A single write may batch multiple records for buffered tasks. shm_flushes counter - diag SHM flushes due to overflow Number of writes performed before the end of a buffered task because adding a record to a batch would exceed vsl_buffer. shm_cont counter - diag SHM lock contention Number of times a write had to wait for the lock. shm_cycles counter - diag SHM cycles through VSL space Number of times a write of log records would reach past the end of the shared memory log, cycling back to the beginning. shm_bytes counter - diag SHM bytes Number of bytes written to the shared memory log. backend_req counter - info Backend requests made n_vcl gauge - info Number of loaded VCLs in total n_vcl_avail gauge - diag Number of VCLs available n_vcl_discard gauge - diag Number of discarded VCLs vcl_fail counter - info VCL failures Count of failures which prevented VCL from completing. bans gauge - info Count of bans Number of all bans in system, including bans superseded by newer bans and bans already checked by the ban-lurker. bans_completed gauge - diag Number of bans marked 'completed' Number of bans which are no longer active, either because they got checked by the ban-lurker or superseded by newer identical bans. bans_obj gauge - diag Number of bans using obj.* Number of bans which use obj.* variables. These bans can possibly be washed by the ban-lurker. bans_req gauge - diag Number of bans using req.* Number of bans which use req.* variables. These bans cannot be washed by the ban-lurker. bans_added counter - diag Bans added Counter of bans added to ban list. bans_deleted counter - diag Bans deleted Counter of bans deleted from ban list. bans_tested counter - diag Bans tested against objects (lookup) Count of how many bans and objects have been tested against each other during hash lookup. bans_obj_killed counter - diag Objects killed by bans (lookup) Number of objects killed by bans during object lookup. bans_lurker_tested counter - diag Bans tested against objects (lurker) Count of how many bans and objects have been tested against each other by the ban-lurker. bans_tests_tested counter - diag Ban tests tested against objects (lookup) Count of how many tests and objects have been tested against each other during lookup. 'ban req.url == foo && req.http.host == bar' counts as one in 'bans_tested' and as two in 'bans_tests_tested' bans_lurker_tests_tested counter - diag Ban tests tested against objects (lurker) Count of how many tests and objects have been tested against each other by the ban-lurker. 'ban req.url == foo && req.http.host == bar' counts as one in 'bans_tested' and as two in 'bans_tests_tested' bans_lurker_obj_killed counter - diag Objects killed by bans (lurker) Number of objects killed by the ban-lurker. bans_lurker_obj_killed_cutoff counter - diag Objects killed by bans for cutoff (lurker) Number of objects killed by the ban-lurker to keep the number of bans below ban_cutoff. bans_dups counter - diag Bans superseded by other bans Count of bans replaced by later identical bans. bans_lurker_contention counter - diag Lurker gave way for lookup Number of times the ban-lurker had to wait for lookups. bans_persisted_bytes gauge - diag Bytes used by the persisted ban lists Number of bytes used by the persisted ban lists. bans_persisted_fragmentation gauge - diag Extra bytes in persisted ban lists due to fragmentation Number of extra bytes accumulated through dropped and completed bans in the persistent ban lists. n_purges counter - info Number of purge operations executed n_obj_purged counter - info Number of purged objects exp_mailed counter - diag Number of objects mailed to expiry thread Number of objects mailed to expiry thread for handling. exp_received counter - diag Number of objects received by expiry thread Number of objects received by expiry thread for handling. hcb_nolock counter - debug HCB Lookups without lock hcb_lock counter - debug HCB Lookups with lock hcb_insert counter - debug HCB Inserts esi_errors counter - diag ESI parse errors (unlock) esi_warnings counter - diag ESI parse warnings (unlock) vmods gauge - info Loaded VMODs n_gzip counter - info Gzip operations n_gunzip counter - info Gunzip operations n_test_gunzip counter - info Test gunzip operations Those operations occur when Varnish receives a compressed object from a backend. They are done to verify the gzip stream while it's inserted in storage. http1_iovs_flush counter - info Premature iovec flushes Number of additional writes performed on HTTP1 connections because the number of IO vectors was too small to submit all possible IO in one go. This number is configured through the http1_iovs parameter for client connections and implicitly defined by the amount of free workspace for backend connections. MEMPOOL MEMORY POOL COUNTERS live gauge - debug In use pool gauge - debug In Pool sz_wanted gauge - debug Size requested sz_actual gauge - debug Size allocated allocs counter - debug Allocations frees counter - debug Frees recycle counter - debug Recycled from pool timeout counter - debug Timed out from pool toosmall counter - debug Too small to recycle surplus counter - debug Too many for pool randry counter - debug Pool ran dry MGT MANAGEMENT PROCESS COUNTERS uptime counter - info Management process uptime Uptime in seconds of the management process child_start counter - diag Child process started Number of times the child process has been started child_exit counter - diag Child process normal exit Number of times the child process has been cleanly stopped child_stop counter - diag Child process unexpected exit Number of times the child process has exited with an unexpected re- turn code child_died counter - diag Child process died (signal) Number of times the child process has died due to signals child_dump counter - diag Child process core dumped Number of times the child process has produced core dumps child_panic counter - diag Child process panic Number of times the management process has caught a child panic SMA MALLOC STEVEDORE COUNTERS c_req counter - info Allocator requests Number of times the storage has been asked to provide a storage seg- ment. c_fail counter - info Allocator failures Number of times the storage has failed to provide a storage segment. c_bytes counter - info Bytes allocated Number of total bytes allocated by this storage. c_freed counter - info Bytes freed Number of total bytes returned to this storage. g_alloc gauge - info Allocations outstanding Number of storage allocations outstanding. g_bytes gauge - info Bytes outstanding Number of bytes allocated from the storage. g_space gauge - info Bytes available Number of bytes left in the storage. SMF FILE STEVEDORE COUNTERS c_req counter - info Allocator requests Number of times the storage has been asked to provide a storage seg- ment. c_fail counter - info Allocator failures Number of times the storage has failed to provide a storage segment. c_bytes counter - info Bytes allocated Number of total bytes allocated by this storage. c_freed counter - info Bytes freed Number of total bytes returned to this storage. g_alloc gauge - info Allocations outstanding Number of storage allocations outstanding. g_bytes gauge - info Bytes outstanding Number of bytes allocated from the storage. g_space gauge - info Bytes available Number of bytes left in the storage. g_smf gauge - info N struct smf g_smf_frag gauge - info N small free smf g_smf_large gauge - info N large free smf SMU UMEM STEVEDORE COUNTERS c_req counter - info Allocator requests Number of times the storage has been asked to provide a storage seg- ment. c_fail counter - info Allocator failures Number of times the storage has failed to provide a storage segment. c_bytes counter - info Bytes allocated Number of total bytes allocated by this storage. c_freed counter - info Bytes freed Number of total bytes returned to this storage. g_alloc gauge - info Allocations outstanding Number of storage allocations outstanding. g_bytes gauge - info Bytes outstanding Number of bytes allocated from the storage. g_space gauge - info Bytes available Number of bytes left in the storage. VBE BACKEND COUNTERS happy bitmap - info Happy health probes Represents the last probe results as a bitmap. Happy probes are bits set to 1, and the unhappy ones are set to 0. The highest bits repre- sent the oldest probes. bereq_hdrbytes counter - info Request header bytes Total backend request header bytes sent bereq_bodybytes counter - info Request body bytes Total backend request body bytes sent beresp_hdrbytes counter - info Response header bytes Total backend response header bytes received beresp_bodybytes counter - info Response body bytes Total backend response body bytes received pipe_hdrbytes counter - info Pipe request header bytes Total request bytes sent for piped sessions pipe_out counter - info Piped bytes to backend Total number of bytes forwarded to backend in pipe sessions pipe_in counter - info Piped bytes from backend Total number of bytes forwarded from backend in pipe sessions conn gauge - info Concurrent connections used The number of currently used connections to the backend. This number is always less or equal to the number of connections to the backend (as, for example shown as ESTABLISHED for TCP connections in net- stat) due to connection pooling. req counter - info Backend requests sent unhealthy counter - info Fetches not attempted due to backend being unhealthy busy counter - info Fetches not attempted due to backend being busy Number of times the max_connections limit was reached fail counter - info Connections failed Counter of failed opens. Detailed reasons are given in the fail_* counters (DIAG level) and in the log under the FetchError tag. This counter is the sum of all detailed fail_* counters. All fail_* counters may be slightly inaccurate for efficiency. fail_eacces counter - diag Connections failed with EACCES or EPERM fail_eaddrnotavail counter - diag Connections failed with EADDRNOTAVAIL fail_econnrefused counter - diag Connections failed with ECONNREFUSED fail_enetunreach counter - diag Connections failed with ENETUNREACH fail_etimedout counter - diag Connections failed ETIMEDOUT fail_other counter - diag Connections failed for other reason helddown counter - diag Connection opens not attempted Connections not attempted during the backend_local_error_holddown or backend_remote_error_holddown interval after a fundamental connec- tion issue. WAITER WAITER COUNTERS conns gauge - debug Number of idle connections Number of idle connections being waited over. remclose counter - debug Number of idle connections closed by peer Number of idle connections that experienced closure by peer while being waited for. timeout counter - debug Number of idle connections timeout Number of idle connections that experienced a timeout event while being waited for. action counter - debug Number of idle connections read events Number of idle connections that experienced a read event while being waited for. AUTHORS This man page was written by Lasse Karstensen, using content from vsc2rst written by Tollef Fog Heen. VARNISH-COUNTERS(7)
NAME | LCK LOCK COUNTERS | MAIN MAIN COUNTERS | MEMPOOL MEMORY POOL COUNTERS | MGT MANAGEMENT PROCESS COUNTERS | SMA MALLOC STEVEDORE COUNTERS | SMF FILE STEVEDORE COUNTERS | SMU UMEM STEVEDORE COUNTERS | VBE BACKEND COUNTERS | WAITER WAITER COUNTERS | AUTHORS
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=varnish-counters&sektion=7&manpath=FreeBSD+Ports+14.3.quarterly>